Process for the preparation of an acrylate-vinyl chloride graft

Details Process for the preparation of an acrylate-vinyl chloride graft Process for the preparation of an acrylate-vinyl chloride graft

1988-10-20

1991-01-01

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 85, 525262, 525263, 525305, 525308, 525317, C08F26504, C08L 2706

Patent

active

049819070

ABSTRACT:
A process is described for the preparation of a polymer which contains, besides polymerized units of vinyl chloride, 30 to 60% by weight, relative to the polymer, of polymerized units of an acrylate, if appropriate together with copolymerizable monomers. The acrylate is firstly polymerized in aqueous emulsion with addition of a monomer containing at least 2 ethylenically unsaturated, non-conjugated double bonds in the presence of a fatty acid salt and in the presence of an alkane- or alkylarylsulfonate. Polymerization in aqueous suspension is then carried out in which vinyl chloride, customary polymerization auxiliaries, a precipitant for the emulsifiers used in the emulsion polymerization, and water are initially introduced, and the acrylate dispersion produced by emulsion polymerization is subsequently added. Polymers of high bulk density and good free-flowing properties which can easily be demonomerized are thus obtained. Mixed with vinyl chloride homopolymers, moldings having good impact resistance and surface quality are obtained with good processability.

REFERENCES:
patent: 3832318 (1974-08-01), Gallagher et al.
patent: 3969431 (1976-07-01), Gallagher
patent: 4719265 (1988-01-01), Thunig et al.
Derwent Abstract 16356T-A, abstract of Japanese Patent Publication No. 47-7454 (1972).

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